Machine for molding box toes



Jain. 9,1923.v y

- 1,441,456 A. J. RYAN MAcHxNE PoR MoLDlNc Boy( Toes. Fl L ED JUNE, 30. 1,919.

3 SHEETS-SHEET I Jan; 9, 1923.r l l A. U. RYAN.

MACHINE EoR MoLmNcBx ToEs.' l

FILED JUNE 30, 1919.

3 SHEETS-SHEET 2 Jan.v 9, 1923.

A. J. RYAN.

MACHINE FOR MoLDlNG Box ToEs. FILED JUNE 3U, i919.

duf

3 sHgE-SHEET 3.

Patented danyg, 1923.

' narran stares 'tiene' Partnr ortica* ALBERT J. RYAN, OF CINCINNATI, OHIO.

MACHINE ron rtroisieme B0X rross.

Application led `Tune 3Q, 191,9. Serial No. 307,676.

lowing is a full, clear, and exact descrip-L tion, reference beingv had to the accompanying drawings, forming a part oiE this speciiication.

s My invention relates to machine for mold-v` ing box toe pieces prior to their `incorporation into the shoe along with the upper according` to that process ot manufacturing shoes set forth in my application for pat-` cnt bearing Serial No. 284,701, tiled lilarch,

24, 1919, to which reference is hereby made.

rlie object in this machine is to provide a means vtor molding smoothly withoutwrin-4 kles or folds, a. piece oli plastic material, over a last for a desired shape of toe, said' material taking therebyv a permanent molded form, in which :form 1t is inserted in the shoe. l

The problems involved are increased by table beneath the bed is the foot lever 8i the necessity ot forming a dependent or reentrant shoulder for `the permanent or liardenedbox toe piece whereby thesame may be stitched into the shoe. Furthermore thefadapting ofthe machine to use with toe lasts of various sizes and shapes requires special centering devices and resilience of parts to accommodate' the machine to its various requirements.

ln an application for patent filed by me on' March 24, y1919, Serial No. 284,701, I describe a machine for pressing box toes over the lasts of shoes after their incorpo'- ration into the upper, rand after thelasting has begun on the shoe. The machine is uti-` siliency and the desirable 'centering .oi the pressing means, which areprovided by this present machine. f

vThe invention `herein also involves rthe provision of means tor automatically ortoe` semi-automatically insertingl various lasts over the work table in rotation, .and for a movable worlrtable and means in addition to the pressing" devices for forming a channel beneath the toe form itselt.

rllhe above various' objects andk other advantages to be duly noted, l accomplish by` that certain arrangement and construction of parts to be hereinafter more ,specifically pointed out and claimed.

In the drawings, F igure 1 is a sideelevation ofthe ma.- chinepartly broli'en away. n `FigureQ is affront elevationthereof@ Figure 3 is a top plan view thereof.

the line 4 4 of Figure 1.

Figure 5 is a detail'plan view of the work support as visible from ya section taken on the linev 5--5 or' Figure 1. Y

Figure 6 is a detail plan `view oi thecenu tering devicer as visible from a section taken onthe line G-of Figure 4.

Figure 7 is a plan view of -a work holder. y

The machine is mounted by means oi: a table having-` legs 1 and a bed 2. The bed has thereon the uprights 8, which at their forward portion support the rods 4,4, for the cross head 5. The `cross head is provided with sleeves 6, 6, engaging over and sliding on the bars oi? rods 4;, and `also a centralw depending hollow shaft 7. Pivoted on the having the ,treadle 9,` which said lever is connected by bars 10 with the cross head.

On the rear portion oi' thebed is journalle'd'an uprigl'itv shaft 11 which supports the last carrierlQ. lAt the forward portion oi" the table bed is mounted the .work support 13, which is mounted by means of posts 14, sliding'in dash pots 15 on the bed, and by means oi double toggles 16. lt isof horseshoe shape so to permit the last to` be insertedy between its arms.

With this brief description of the main parts of the machine each section will be lrieiy dealt with 'under a separate sub- The cross .ieadcmd presser device.,` It has been noted that depressionof the foot treadle draws down the cross Ahead and with it, of course, the hollow shaft 7. Mounted on the shaft 7 is a plate 11T oi' semi- Loval shape which has distributed around its upper edge the shells4 18, within which are the spring lpressed plungers 19,. Pivoted at'QO to the plungers are the fingers 2l, said fingers being secured at their lower end to a piece ofiiexible material Q2. Hthin .the shaft 7 is a plunger 23 pressed the spring 24 and between the plunger Q3 and the G5 Figure 4C is a detail vertical section on the work support where it is connected to the bracket cables 28 at each end. The cables are guided over pulleys 29 and guides 30 and pass over cams 31 mounted on a shaft 32. On the shaft 32 is a pinion 33 and the cables 28 are secured fast to the cams. Reciprocallyfmounted in the bed 2 of the machine is a bar 341- connected to the foot lever 8. The bar has a rack 35 on its upper end', which rack meshes with the pin ion 33 upon the partial depression of the foot treadle. rlhe foot treadle has, however, considerable motion before the rack 35 comes into play.

The result, therefore, of depressing the foot treadle is to bring down the cross head and then pull on both ends of the spring 27. As shown in Figures 1, 3 and 4 a toe mold 34, has been inserted beneath the cross head, this toe mold, having a channell 35 therein, the box toe piece in plastic condition is inserted and held over the toe mold and the depressing of the cross head brings the buffer 25 down over the toe piece. Further depression forces the plunger 23 upwardly and permits the ngers 21 to stretch the flexible member 22 tightly and rmly over the toe piece. The spring 27 will be drawn into the channel 35 coming under the member 22 and toward the lingers on the depression of the foot lever betere the forces described will come into play to smoothly and finely mold the box toe piece t0 conform to the toe mold.

The work support and centering deo/ice.

I have found that it is exceedingly important to have the toe last or form held beneath the cross head by means of a device which is self centering. This is because the various sizes and shapes of toes result in bringing the true working centers of the lasts into varying positions with relation to the machine. In order to get a perfectly molded box without wrinkles the toe last must be free to properly center when under pressure, so that all parts of the toe are equally pressed.

For this purpose a supporting post 36 is used which post bears against a plate 37 which is secured to the toe molds. The post finds itsy mounting in the central disk 38,

- forming the central member or" a series of concentric rings 3S and 39 having their pivotal centers out of line with each other. rIhe outer ring 39 being mounted pivotally at 4x0 on brackets 41 depending from the table 2. T he table is providedy with a wide orifice 4t2 giving considerable freedom of movement to the post 36. Such a ring device `is ordinarily termed a gimbal.

l/Vhenthe pressure members are brought down over the box toe pieces on the toe last, the last will tip to give a firm flat pressure over the buffer 25, and this will throw the post 36 out of exact vertical position. The mounting device described however, will permit the movement of the post in any required angle without altering the firmness of its support to the toe last.

It has been stated that the work support 13 is formed in the shape of a horse shoe, supported on posts 1/1 sliding in dash pots 15 on the table 2. At the rear ends of the horse shoe are the table toggles 16 having a pivot 16h, on the bed 2. One of the toggle arms 16a for each element extends downwardly beyond that pivot 16, and the two extensions are linked together with the bar 43. The lever 44 is pivoted to the end seat of the table 2 and engages the bar 43. rlhis construction permits the work support 13 to be raised and lowered by toggle members 16a, as will be readily observed. Any sort of bifurcated tool may be employed fogr placing the box toe pieces over toe last beneath the cross head, The tool will preferably be shaped like the work support itself and the box toe piece will be pla-ced in the machine in plastic condition. The depression of the cross head resulting in molding the box, as above described, will force the work support downwardly out of the way, but the dashr pot arrangement will prevent the easy depression of the table, thereby resulting in a stretching action caused partly by the pressure from the flexible member 22, but mainly by the rigid arms 21a forcibly holding the toe piece on the work support, thereby stretching and wiping7 it in around the toe last. rlhe stretching caused by the arms 2liL will usually be found suiiicient to form a well molded toe without any flexible member being used at all, but l prefer that both means be employed for perfect results.

A form of tool for inserting the box is shown in Figure 7, having the bifurcated end 415, handle 416 and prongs .4.7. These prongs tend further to increase the stretching action, that is, 'they retain the box toe piece on the work support. For each operation of the machine the work support must be elevated, as has been described. The tool or work holder shown is merely illustrative`v as some better way of retaining the box without tearing the edges by the prongs might well be devised.

The Zust mounting mec/fis.

lt it desired to provide a device for present-ing in rotation a `series of last for the rights and lefts of atleast two sizes of shoes;

For this purpose a rotaryl postlll is located inthe rear of the machine tabler with a ratchet 49, secured fast thereto. Loosely mounted from the post'is a pinion 50'which meshes with a rack 51.` The rack 51 is slid,- a'bly mounted on the machine table and' op-v.

l Radially mounted on the post 11 are thev barstf which have springs 55 upon-them.

The toe llasts arerecessed at 56`to-receive the bars 54.V The post ll'has a block 12 thereon, from which the bars 54; radiate and on this blockl2 are a series of spring catches 58 which khold the-'lastsclose up to the post; Located in a cross bar y59 between the stand ards of the machine is a knock off plate 60 which releases the llast which has been turned to a position facing the support.

Upon this the spring 55 will shoot the last forward until it strikes-an abutment plate y Gl on the rack bar 51.

To change lasts, therefore, the operator pushes in on the handle 52 which returns the last to its latch 58. The handle 52 is then pulled forward which will revolve the last holder around until another last is released and shoots forward.

f rlhis mechanism is shown merely as indicating some form of semi-automatic provision of a rotation of lasts. The entire machine might readily ybe made automatic but it is not believed to be necessary to show and describe a diversity of means for kaccomplishing the mechanical operations which have been described.

Having thus described my invention, what l claim as new and desire to secure by Letters Patent is:

l. ln a device of the characted described,

the combination with a means to form a rbox toe piece over a last therefor comprising in part means to engage the piece throughout the fore part of its periphery, oir' a last support for the last, said support adapted 'to permit the last to center itself under influence of the force applied thereto. l 2. in a device of the character described, the combination with a depressible contact member as one component of an element to forni a box toe over a last therefor said element also comprising` inpart means'to engage the piece throughout the kfore part of its periphery, of a last support for a last. to be operated upon, said support adapted to permit the last to center itself beneath the depressible contact member.

3. ln a device of the character ldescribed, the combination with means to forma boxl ytoe piece over a last therefor, of a last support for a last to be operated upon comprising at least in part a post to receive the last opposite. the point of pressure, and a support for said` post, adapted to permit it to tip reely while retaining the last for operation thereon by the forming means. f y

4. In a device of the character described,

the combination with an element to form a box toe piece vover a last therefor, of a lastsupport for a last ,to be operated upon coinprising at least'in part a post to receive the last opposite the point of pressure, anda gimbal support for said post, comprising concentric rings pivoted along axesat vangles to each other, with the post mounted in the center thereof. l

5. r In a device of the character described, the combination with flexible member adapted to come down over the toe of a last, oic a work support adapted'to retain a boxl toe piece at its edge portions with the main portionlying over the toe of the last, wherebythe `leiible member and work lsupport pio-operate to stretch the'toe piece over the ast.

6. In a machine of the characterdescribed, the combination of a resilient presser member toy initially' lcontact with the' toe oit a last, of a iieXible member about said presser member to comey down and around the-toe of a last and a support for a last adapted to permitv the last to center itself, for the purpose described. v

7. In a machine of the character described,

the combination of a resilient presser member to initially contact with the toe of a coming down and around the toe of the pressure l from the` presser member, and

means for raising said worksnpport ifor new operations. i

10. In a machine of the` character described, the combination "with a presser member for forming-a box toe over the toe last, and a work support positionedl around extending the lasts on their supports, means for rotating` the supports and means controlling the extending` means to advance the lasts when oppositek the presser member, said means for rotating` the supports being adapted to withdraw the lasts from extended position. v

12. ln a machine of the character described. means for supportingv alast, a depressible work support t'or retaining at its edges throughout its fore part, a box toe piece over the toe portion of the last, and a depressible member adapted to move "downwardly against the box toe piece and the work support to form a clamping engagement with the edges of the piece, whereby said work support and depressible member accomplish a stretching of the toe piece over the last. y n f y 18. In, a machine of the character described, means forsupporting a last, a depressible work support forretainingfat its edges throughoutvits fore part, a box toe piece over the toe portionot` the last, a depressible member adapted to move down wardly against the box toe piece and the work support to iorm a clamping engagement with the edges of the piece,y whereby said work support and depressible member accomplish a stretching of the toefpiece over the last, and a wiping element adapted to wipe theboxtoe piece around the edges ot the toe.'l v j k n n, i

14.111 machine/,of the character described7 means for supporting a last, a depressible work support for retainingr a box toe piece over ythe toe portion of the last, and a` depressible member adapted to move downwardly' against the box toe piece and the work support in such manner thatsaid work support and depressible member accomplish. a stretching' of `the toe piece over the last, and press the edges of the toe piece against a shoulder beneath the toe portion ot' the last. i

ALBERT J. RYAN. 

